Telescope Reviews: Is my PST sick...?

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Levine
sage

Reged: 03/24/06
Posts: 238
Loc: Indiana, Wabash County

Is my PST sick...?
#2092426 - 01/03/08 11:39 AM

Purchased a H-a PST from that other online aftermarket equipment website a few weeks ago.
Today, I looked it over carefully for the first time.
When I uncapped the Primary, I noted that the red coating was not uniform, instead appearing speckled, and perhaps uneven. Is this typical? Or do I have a problem?

Thanks!

--------------------
JMI NGT-18 f/4.5 GoTo Reflector, "Magellan"
C14/Homeyer Cradle f/11 XLT Fastar "Modoc"
C11 f/10 CFT XLT Fastar, "Dave"
CotoSKY 8.25" f/6 Achromat, "Blackjack"
Meade AR6 f/8 Achromat, "Kalliopi"
WO FLT 110 f/7 Apo, "Apollo"
Coronado PST f/10 "Icarus"
Canon IS 15 X 50 Binoculars
Losmandy G11/Gemini4
Discmounts DM-6, Sky Commander, StarBeam
Mallincam HPC/Watek monitor
Denk II Universal Power X Switch Binoviewer
Collins I3/Astronomik H-a/Starsweeper
...and some nice glass.

Post Extras:

Jim7728
Postmaster

Reged: 04/10/05
Posts: 5063
Loc: Stoop Landing Observatory, NYC

Re: Is my PST sick...? new

[Re: Levine]
#2092505 - 01/03/08 12:13 PM Attachment (30 downloads)

That does not sound good. The PST should have a light translucent blue coating on the objective. Is your PST doublestacked with a PSM-40 filter? The PSM-40 has a red coating.

Here's what sick PST objective looks like(see attachment) The new PST objective, with the translucent blue coating does not seem to have this problem anymore.

--------------------
Jim
Genesis SDF-f/5.4 FS-102-f/8

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Levine
sage

Reged: 03/24/06
Posts: 238
Loc: Indiana, Wabash County

Re: Is my PST sick...? new

[Re: Jim7728]
#2092615 - 01/03/08 12:59 PM

Quote:

That does not sound good. The PST should have a light translucent blue coating on the objective. Is your PST doublestacked with a PSM-40 filter? The PSM-40 has a red coating.

Here's what sick PST objective looks like(see attachment) The new PST objective, with the translucent blue coating does not seem to have this problem anymore.

I have since confirmed with Meade that this is a rust problem.

They are fixing PST's so affected in or out of warranty for free, plus a $15 reshipping fee. There is a 3 week turnaround time at present.
A public announcement on this subject will appear soon in the print media.
A call to Coronado/Meade will get the ball rolling for others with a similar problem.

Thanks!

Edited by Levine (01/03/08 04:20 PM)

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BYoesle
Pooh-Bah

Reged: 06/12/04
Posts: 1115
Loc: Goldendale, WA USA

Re: Is my PST sick...? new

[Re: Levine]
#2092782 - 01/03/08 01:58 PM

Nice to hear MEADE is offering such good service.

--------------------
Bob Yoesle

You are a child of the universe,
no less than the trees and the stars...
And whether or not it is clear to you,
no doubt the universe is unfolding as it should.

Desiderata